150 



Octoher 20, 1861. 

 President in the Chair. 



Dr. Kellogg read the annexed paper : 



The following species of Lifthyrus was sent from Washoe by Dr. 

 Lanszweert. 



Lathyrns Lanszioerfii, (Kellogg.) Fig. 44. 



Stem slender, acutely quadrangular and striate naked, below ; 

 sparsely somewhat appressed pubescent above, ascending one to two 

 feet in height. 



Leaflets three to four pairs, lineai'-oblanceolate, cuneate, entire, 

 sub-acute, mucronate, sub-sessile, opposite, five to seven-nerved, 

 sub-pubescent, lamina rather rigid, thin, veins prominent, petiole 

 sulcate, striate, angled, tendrils three-parted, pubescence loosely ap- 

 "pressed. Stipules semi-sagittate, linear-lanceolate, sub-falcate, en- 

 tire, very acute or nearly subulate pointed, upper third sparsely 

 pubescent, ciliate, nerved. 



Peduncles shorter than the leaves (one to two inches long), 

 angled, one to four-flowered, flowers pale flesh-colored, rather large. 

 Calyx tubular-campanulate, somewhat two-lipped, teeth broad or 

 triangular-lanceolate, two upper deeply cleft, short ; all one to three- 

 nerved (the marginal veins scarcely to be regarded as lateral 

 nerves). Calyx also nerved from the sinuses, margins ciliate. 

 Vexillum obovate, emarginate, cuneate, margins minutely waved ; 

 wings adherent to the keel, oblong, wrinkled, the internal tooth-hke 

 process large, causing a conspicuous swell or outward curve at the 

 origin of the claws, tufted, bearded on the upper side below the 

 stigma, and thence a scabrously bearded line extending down nearly 

 the whole length. Embryo legume straight, oblanceolate, com- 

 pressed, four to six-seeded, glabrous. Mature fruit unknown. 



Remarks. — The plant appears to be closely alhed to L. i^olymor- 

 phus, Nutt. But that species is from six to ten foliate above, 

 leaflets obtuse at each end, crowded at the base of the stem, which 

 is erect and branched — the leaflets are also scattered and the petio- 

 les terminated by a small bristle ; besides, the stipules are minutely 

 semi-sagittate at the base. The peduncles longer than the leaves 

 and many flowered — flowers purple. The calyx segments by no 

 means agree, for they are as remote as possible from being subulate^ 

 — " someAvhat unequal " is not applicable. 



It is also near L. myrtifolius, but that has obtuse glabrous leaf- 

 lets and scabrous marginal stipules, peduncles longer than the 

 leaves, &c. 



